Datasheet excerpt: Technical data of LVL-A7-BG4B-E5PU-CG-EMS

General specifications

Measuring method

The tuning fork is brought to its resonance frequency by means of a piezoelectric drive. If the tuning fork is covered by liquid, this frequency changes. The electronics monitor the resonance frequency and indicate whether the tuning fork is freely vibrating or is covered by liquid.

Construction type

device with short tube

Operating mode

MAX = maximum safety:The device keeps the electronic switch closed as long as the liquid level is below the fork.example application: overspill protectionMIN = minimum safety:The device keeps the electronic switch closed as long as the fork is immersed in liquid.example application: dry running protection of pumpsThe electronic switch opens if the limit is reached, if a fault occurs or in the event of a power fails (quiescent current principle)

Supply

Connection

This device may be used with any sequential circuit, as long as the circuit can support the electrical circuit values of the switching elements.

Pepperl+Fuchs is a leading developer and manufacturer of electronic sensors and components for the global automation market. Continuous innovation, enduring quality, and steady growth have been the foundation of our success for more than 70 years. Pepperl+Fuchs employs 6,200 people worldwide and has manufacturing facilities in Germany, USA, Singapore, Hungary, Indonesia and Vietnam, most of them ISO 9001 certified.